Last name שלזינגר (Schlesinger 
, שלזינגר , Shlesinger 
) , all over the world, is a common cognomen. The family name שלזינגר is habitual in British Virgin Islands, where it is a common surname, Israel, where it is quite a common surname, and Austria, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Germany, and Israel. Much less frequently, שלזינגר is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Schlesinger | Germany, Guatemala, Austria, Israel, United States |
| שלזינגר | Israel |
| Shlesinger | Israel, Canada, United States, United Kingdom, South Africa |
| Shlezinger | Israel, United States, Bulgaria, Canada |
Schlessinger, Šlesingr, Šlezinger, Šlezingerová, and Шлезингер
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יצחק שלזינגר IL (b. 1926) |
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משה יהודה שלזינגר IL (b. 1932) |
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| שמואל שלזינגר Israeli painter, IL (b. 1896) |
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| יחיאל מיכל שלזינגר IL (b. 1898) |
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אברהם יפה שלזינגר IL (b. 1948) |
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אליהו שלזינגר IL (b. 1949) |
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| פריץ שלזינגר Israeli photographer, IL (b. 1915) |
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שלמה שלזינגר IL (b. 1965) |
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אהרן דוד שלזינגר Israeli writer, IL |
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| מאיר שלזינגר Israeli Rabbi, IL (b. 1933) |
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יהודה שלזינגר Israeli journalist, IL (b. 1984) |
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אליס שלזינגר Israeli-British judoka, IL (b. 1988) |
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| דוד שלזינגר IL (b. 1947) |
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| אריאל שלזינגר Israeli contemporary artist, IL (b. 1980) |
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| ניר שלזינגר researcher, IL (b. 1983) |
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